Related Clues:

• Letters under TUV, on many phones
• Letters accompanying zero
• Job largely automated these days: Abbr
• It's just under 8: Abbr
• Letters on a phone button
• It can be found under TUV
• Abbr. accompanying a zero
• Phone abbr
• Abbr. near a 0
• Drive-in theater draw ... with a literal hint to 4- and 21-Down
• Neighbor of some stars
• Abbr. above 0 on a phone
• Letters by the pound
• Letters under TUV, perhaps
• Letters below TUV